Was Leonardo DiCaprio in the show OZ?

No, Leonardo DiCaprio was not in the show "Oz." "Oz" is an HBO drama series that aired from 1997 to 2003, primarily featuring actors like Ernie Hudson, J.K. Simmons, and Rita Moreno. DiCaprio is known for his roles in films such as "Titanic," "Inception," and "The Revenant," but he did not appear in this particular television series.